CVE-2023-2430: linux linux_kernel Improper Resource Locking
Vulnerability summary
CVE-2023-2430 is a medium (CVSS 5.5) Improper Resource Locking vulnerability in linux linux_kernel. EPSS estimates a 0.15% chance of exploitation in the next 30 days, higher than 4.5% of scored vulnerabilities.
Not severe (CVSS 5.5, local access); no exploitation reported by the 5 checked sources
Source freshness unavailable
How is this decided?Advisory lineage
Upstream 0 · Downstream 7 · Related 6Timeline
- 23-07-2023PublishedVulnerability first disclosed.
- 06-03-2025Last modifiedVulnerability information updated.
Description
A vulnerability was found due to missing lock for IOPOLL flaw in io_cqring_event_overflow() in io_uring.c in Linux Kernel. This flaw allows a local attacker with user privilege to trigger a Denial of Service threat.
CVSS metrics
4 scores · 4 sources · 1 version- OSV · UbuntuEcosystem advisory · calculated5.5MediumCVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:N/I:N/A:H
- OSV · DebianEcosystem advisory · calculated5.5MediumCVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:N/I:N/A:H
- NVDNIST5.5MediumCVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:N/I:N/A:H
EPSS trend
Probability
0.15%
Chance of exploitation in the next 30 days
Percentile
5%
Versus all other CVEs
30-day change
No change 0.00 pp
From 0.15% on 04-10-2026
Known exploited
Compare KEV catalogs
CISA KEVNot in the CISA KEV catalog.
ENISA CNWNot in the ENISA CNW catalog.
CIRCLNot in the CIRCL catalog.
Public exploits
0 foundNo public exploits indexed.
Weaknesses
CWE · root cause- CWE-413Improper Resource LockingThe product must have exclusive access to a resource, but it does not lock or does not correctly lock that resource.
- CWE-667Improper LockingThe product does not properly acquire or release a lock on a resource, leading to unexpected resource state changes and behaviors.
Affected systems
Known conditions: local access, low-privilege account, no user interaction (CVSS vector). Other conditions: not stated in public data.
Ubuntu50 products
- linux-allwinner-5.19< 5.19.0-1015.15~22.04.1
- linux-aws-5.0All versions (No fix recorded)
- linux-aws-5.11All versions (No fix recorded)
- linux-aws-5.13All versions (No fix recorded)
- linux-aws-5.19< 5.19.0-1028.29~22.04.1
Debian1 product
- linux< 6.1.52-1 | < 6.3.7-1
Linux1 product
- linux_kernelEOL< 6.2 | 6.2 | 6.2:rc1 | 6.2:rc2 | 6.2:rc3 | 6.2:rc4
3 vendors · 52 products
References
12 links- git.kernel.org/pub/…Patch
www.debian.org/security/2023/dsa-5492Vendor Advisory
